• Skip to main content
  • Skip to primary sidebar
  • Skip to secondary sidebar
  • Skip to footer

Computer Notes

Library
    • Computer Fundamental
    • Computer Memory
    • DBMS Tutorial
    • Operating System
    • Computer Networking
    • C Programming
    • C++ Programming
    • Java Programming
    • C# Programming
    • SQL Tutorial
    • Management Tutorial
    • Computer Graphics
    • Compiler Design
    • Style Sheet
    • JavaScript Tutorial
    • Html Tutorial
    • Wordpress Tutorial
    • Python Tutorial
    • PHP Tutorial
    • JSP Tutorial
    • AngularJS Tutorial
    • Data Structures
    • E Commerce Tutorial
    • Visual Basic
    • Structs2 Tutorial
    • Digital Electronics
    • Internet Terms
    • Servlet Tutorial
    • Software Engineering
    • Interviews Questions
    • Basic Terms
    • Troubleshooting
Menu

Header Right

Home » Servlet » Database » MySql LENGTH Function in Java Servlet
Next →
← Prev

MySql LENGTH Function in Java Servlet

By Dinesh Thakur

This Function will return the length of a string in bytes.

First i made a database named ‘dbase’ within the reference of mySql(php myAdmin) with required fields and values in it. Then according to need of program, I import all the java packages from the java library. I create a class named ‘MySqlLENGTHFunction’, which extends ‘HttpServlet’. Then, i use serviceMethod() that will bring the request from doGet()Method for output on web browser. After, using serviceMethod() i loaded all the required Drivers mandatory for database accessing. Here after, i declare variables as first i use ‘connection’ this will use to create a link between database and the java code. Then i use ‘resultSet’ this use to get the value from selected columns and rows. And the other one i use is ‘preparedStatement’ this will use to executing the selected Query like executeQuery() as (Select LENGTH(‘MySql’)).I use doGet()Method for output on the web browser.

Now to get the output on the web browser in an impressive look I use ‘HTML’ code and some of these tags, which will bring output in the tabular form on the web browser.

 import java.io.IOException; 
import java.io.PrintWriter;
import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class MySqlLENGTHFunction extends HttpServlet
 {
       public void service(HttpServletRequest rq, HttpServletResponse rp)throws IOException, ServletException
         {
              rp.setContentType("text/html");
              PrintWriter disp = rp.getWriter();
              String driver = "com.mysql.jdbc.Driver";
              String url = "jdbc:mysql://localhost/dbase";
              String uid = "root";
              String psw = "root";
              Connection con=null;
              PreparedStatement ps = null;
              ResultSet rs;
              try
                {
                    Class.forName(driver);
                    con = DriverManager.getConnection(url,uid,psw);
                    ps=con.prepareStatement("Select LENGTH('MySql') as lnth");
                    rs = ps.executeQuery();
                 String title = "Using LENGTH Function";
                   String docType ="<!doctype html public \"-//w3c//dtd html 4.0 " + "transitional//en\">\n";
                 disp.println(docType + "<html>\n" + "<head><title>" + title + "</title></head>\n" +
                    "<body bgcolor=\"#f4efef\">\n" + "<h1 align=\"center\">" + title + "</h1>\n" + "<ul>\n" +
                 "<table width=\"50%\" border=\"1\" align=\"center\">\n" + "<th>Value Is </th>\n"+ "</body> </html>");
                   while(rs.next())
                       {
                             String val = rs.getString(1);
                          disp.println("<tr><td align=\"center\">" + val +"</td></tr>" );  
                       }     
             }        
                          catch(Exception e) 
                              {
                                    e.printStackTrace();
                              }
                                    disp.close();
      }
                       public void doPost(HttpServletRequest rq,HttpServletResponse rp)throws IOException,ServletException
                           {
                               doGet(rq,rp);
                           }
  }
WEB.xml
 
<servlet>
   <servlet-name>MySqlLENGTHFunction</servlet-name>
   <servlet-class>MySqlLENGTHFunction</servlet-class>
</servlet>
<!-- servlet mapping -->
<servlet-mapping>
   <servlet-name>MySqlLENGTHFunction</servlet-name>
   <url-pattern>/MySqlLENGTHFunction</url-pattern>
</servlet-mapping>

You’ll also like:

  1. MySql OCTET LENGTH Function in Java Servlet
  2. MySql BIT LENGTH Function in Servlet
  3. MySql CHAR LENGTH Function
  4. MySql LN Function in Java Servlet
  5. MySql PI Function in Java Servlet
Next →
← Prev
Like/Subscribe us for latest updates     

About Dinesh Thakur
Dinesh ThakurDinesh Thakur holds an B.C.A, MCDBA, MCSD certifications. Dinesh authors the hugely popular Computer Notes blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps.

Dinesh Thakur is a Freelance Writer who helps different clients from all over the globe. Dinesh has written over 500+ blogs, 30+ eBooks, and 10000+ Posts for all types of clients.


For any type of query or something that you think is missing, please feel free to Contact us.


Primary Sidebar

SQL Tutorials

SQL Tutorials

  • SQL - Home
  • SQL - Select
  • SQL - Create
  • SQL - View
  • SQL - Sub Queries
  • SQL - Update
  • SQL - Delete
  • SQL - Order By
  • SQL - Select Distinct
  • SQL - Group By
  • SQL - Where Clause
  • SQL - Select Into
  • SQL - Insert Into
  • SQL - Sequence
  • SQL - Constraints
  • SQL - Alter
  • SQL - Date
  • SQL - Foreign Key
  • SQL - Like Operator
  • SQL - CHECK Constraint
  • SQL - Exists Operator
  • SQL - Drop Table
  • SQL - Alias Syntax
  • SQL - Primary Key
  • SQL - Not Null
  • SQL - Union Operator
  • SQL - Unique Constraint
  • SQL - Between Operator
  • SQL - Having Clause
  • SQL - Isnull() Function
  • SQL - IN Operator
  • SQL - Default Constraint
  • SQL - Minus Operator
  • SQL - Intersect Operator
  • SQL - Triggers
  • SQL - Cursors

Advanced SQL

  • SQL - Joins
  • SQL - Index
  • SQL - Self Join
  • SQL - Outer Join
  • SQL - Join Types
  • SQL - Cross Join
  • SQL - Left Outer Join
  • SQL - Right Join
  • SQL - Drop Index
  • SQL - Inner Join
  • SQL - Datediff() Function
  • SQL - NVL Function
  • SQL - Decode Function
  • SQL - Datepart() Function
  • SQL - Count Function
  • SQL - Getdate() Function
  • SQL - Cast() Function
  • SQL - Round() Function

Other Links

  • SQL - PDF Version

Footer

Basic Course

  • Computer Fundamental
  • Computer Networking
  • Operating System
  • Database System
  • Computer Graphics
  • Management System
  • Software Engineering
  • Digital Electronics
  • Electronic Commerce
  • Compiler Design
  • Troubleshooting

Programming

  • Java Programming
  • Structured Query (SQL)
  • C Programming
  • C++ Programming
  • Visual Basic
  • Data Structures
  • Struts 2
  • Java Servlet
  • C# Programming
  • Basic Terms
  • Interviews

World Wide Web

  • Internet
  • Java Script
  • HTML Language
  • Cascading Style Sheet
  • Java Server Pages
  • Wordpress
  • PHP
  • Python Tutorial
  • AngularJS
  • Troubleshooting

 About Us |  Contact Us |  FAQ

Dinesh Thakur is a Technology Columinist and founder of Computer Notes.

Copyright © 2025. All Rights Reserved.

APPLY FOR ONLINE JOB IN BIGGEST CRYPTO COMPANIES
APPLY NOW